Which axis in a standard graph is perpendicular to the horizontal axis?

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Multiple Choice

Which axis in a standard graph is perpendicular to the horizontal axis?

Explanation:
In a standard Cartesian graph, the horizontal axis runs left to right and is the X axis. The axis that goes up and down and is perpendicular to it is the Y axis. The origin is just the point where the axes cross, not an axis itself. The Z axis belongs to a three‑dimensional setup and isn’t the axis perpendicular to the horizontal in the usual 2D graph. So the axis perpendicular to the horizontal axis is the Y axis.

In a standard Cartesian graph, the horizontal axis runs left to right and is the X axis. The axis that goes up and down and is perpendicular to it is the Y axis. The origin is just the point where the axes cross, not an axis itself. The Z axis belongs to a three‑dimensional setup and isn’t the axis perpendicular to the horizontal in the usual 2D graph. So the axis perpendicular to the horizontal axis is the Y axis.

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